# HALOWERK Atlantic Land – Belgium Aspect (Surface Gradient Direction)

> HALOWERK Atlantic Land – Belgium Aspect (Surface Gradient Direction) is a paid API for AI agents from atlantikland.halowerk.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-13).

Returns the circular direction (in degrees, clockwise from north) of the dominant surface gradient for a given coordinate within Belgium.

## Facts

- Endpoint: POST https://atlantikland.halowerk.com/v1/be-aspect
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/halowerk-atlantic-land-belgium-aspect-surface-gradient-direction-44f59fc1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_MB6jmHJAsOyAQC1AT36v1

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability halowerk-atlantic-land-belgium-aspect-surface-gradient-direction-44f59fc1 -d '<json body>'
```

Example prompt: What direction does the land slope face at latitude 50.85 and longitude 4.35 in Belgium — give me the aspect angle clockwise from north using HALOWERK Atlantic Land.

## When to prefer this

Use this endpoint when you specifically need the dominant surface slope direction (aspect) for a point location within Belgium, particularly for use cases like solar orientation assessment, agricultural planning, hydrological modeling, or ecological habitat analysis. Prefer this over general-purpose GIS APIs when you need a pre-validated, pay-per-call result scoped to Belgium with no infrastructure overhead.

## Known failure modes

- Coordinate outside Belgium boundary — rejected before payment, likely a 422 or 400 error
- Latitude or longitude out of published European coverage range (34–72.5 N, -31.5–40.5 E) — schema validation error
- Missing required latitude or longitude parameter — 400 bad request
- Flat terrain with no discernible aspect direction — may return null or a defined no-data value
- Network or service unavailability — 5xx error

## How this service works

Circular direction of the dominant surface gradient, clockwise from north. The coordinate is validated against the Natural Earth boundary for Belgium; results outside it are rejected before payment.

## Output

A numeric value representing the circular direction (in degrees, 0–360, clockwise from north) of the dominant surface gradient at the queried coordinate within Belgium. Coordinates outside the Belgium boundary are rejected before payment is charged.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "latitude": {
   "type": "number",
   "maximum": 72.5,
   "minimum": 34,
   "description": "WGS84 latitude inside the published European coverage."
  },
  "longitude": {
   "type": "number",
   "maximum": 40.5,
   "minimum": -31.5,
   "description": "WGS84 longitude inside the published European coverage."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/halowerk-atlantic-land-belgium-aspect-surface-gradient-direction-44f59fc1/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from atlantikland.halowerk.com](https://www.zero.xyz/host/atlantikland.halowerk.com/llms.txt)